CN107681648B - A kind of power of alterating and direct current partition method being shorted test for substation secondary - Google Patents
A kind of power of alterating and direct current partition method being shorted test for substation secondary Download PDFInfo
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- CN107681648B CN107681648B CN201711117917.XA CN201711117917A CN107681648B CN 107681648 B CN107681648 B CN 107681648B CN 201711117917 A CN201711117917 A CN 201711117917A CN 107681648 B CN107681648 B CN 107681648B
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- 238000012360 testing method Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005192 partition Methods 0.000 title claims abstract description 26
- 230000000007 visual effect Effects 0.000 claims abstract description 27
- 230000001960 triggered effect Effects 0.000 claims description 60
- 238000001514 detection method Methods 0.000 claims description 37
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/008—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result preventing unsafe switching operations in substations (Schaltfehlerschutz)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention belongs to secondary equipment in power system service technique fields, disclose a kind of power of alterating and direct current partition method that test is shorted for substation secondary, when the both ends for being shorted test are direct current or are exchange, are shorted circuit conducting；When described one end for being shorted test is exchange, one end is direct current, the short circuit circuit is disconnected, and audible and visual alarm circuit issues audible and visual alarm information.The present invention, which solves, to be shorted test in the prior art and is easy to appear maloperation, thus the problem of causing the AC in the DC system, can guarantee being effectively isolated for alternating current and direct current power supply when maloperation.
Description
Technical field
The present invention relates to secondary equipment in power system service technique fields, more particularly to a kind of substation secondary that is used for be shorted
The power of alterating and direct current partition method of test.
Background technique
Transformer station direct current system is isolated neutral system, is supervised online by battery, charging unit, DC loop, direct current system
It surveys the part such as device to form, for breaker control, relay protection, device signal etc..AC system is earthed system, for shining
Bright, printing, fan etc..When alternating voltage seals in direct current system, by secondary cable, distribution capacity is formed into a loop over the ground, will be drawn
False protection, switch mis-jumping are played, may cause the great of more breaker fault-free trips or even whole station power loss in standing when serious
Safety accident.
In service work, for the closed state of simulator contact, or the integrality of test secondary circuit, often
It needs to carry out short circuit test between connecting terminal.AC and DC circuit is two mutually independent systems, but in substation secondary
System is typically arranged in same protection screen, control cabinet or terminal box when designing.Especially put into operation time substation earlier, connects
Line terminals, which are commonly present, arranges phenomenon lack of standardization, mark is unintelligible, drawing is inaccurate, and when alternating current-direct current terminal is shielding distance in cabinet
More recently condition, staff are easy accidentally to be shorted alternating current-direct current circuit when carrying out short-circuit operation.
To prevent the AC in the DC system in maintenance process, the means of strengthening management are relied primarily at present, promote safety wind
Danger consciousness is to be managed, but AC and DC terminal in the cold control cabinet of secondary terminals dense arrangement, especially main transformer, blower, thermometer
It is positioned adjacent to, it is difficult to fundamentally take precautions against maloperation.In addition, the longer substation of the time limit that much puts into operation be commonly present drawing it is incomplete or
Wrong situation, these all bring great security risk.To prevent the safety accident that may cause, it is necessary to pass through technology
The phenomenon that means identify and take precautions against the AC in the DC system caused by short circuit test maloperation.
Summary of the invention
The embodiment of the present application is by providing a kind of power of alterating and direct current partition method for being shorted test for substation secondary, solution
It has determined to be shorted to test in the prior art and has been easy to appear maloperation, thus the problem of causing the AC in the DC system.
The embodiment of the present application provides a kind of power of alterating and direct current partition method that test is shorted for substation secondary, works as short circuit
When the both ends of test are direct current or are exchange, it is shorted circuit conducting；When described one end for being shorted test is exchange, one end is
When direct current, the short circuit circuit is disconnected, and audible and visual alarm circuit issues audible and visual alarm information；
The circuit that is shorted connects the both ends for being shorted test, and the short circuit circuit is in parallel with voltage triggered circuit；Institute
State audible and visual alarm circuit respectively with manual control circuit, power sources in parallel；
The voltage triggered circuit and the manual control circuit are accused for short circuit circuit, the acousto-optic described in co- controlling
Alert circuit is turned on or off；
The voltage triggered circuit includes rectifier diode, current-limiting resistance, voltage detection unit, ac filter unit；Four
Only the rectifier diode is connected with four current-limiting resistances respectively, and forms bridge circuit；The voltage detection unit and
The both ends of the ac filter unit parallel connection access rectifier bridge；
The short circuit circuit includes voltage triggered normally closed contact；
The manual control circuit includes button, intermediate relay, encourages trigger relay, the first divider resistance by force, and according to
Secondary series connection；The button is connect with one end of the power supply, and the other end of first divider resistance and the power supply connects
It connects；
The power supply is DC power supply；
The audible and visual alarm circuit includes voltage triggered normal opened contact, light emitting diode, intermediate relay normally closed contact, bee
Ring device, the second divider resistance, third divider resistance；The voltage triggered normal opened contact is connect with one end of the power supply；It is described
One end of intermediate relay normally closed contact is connect with the buzzer, the other end of the intermediate relay normally closed contact respectively with
The voltage triggered normal opened contact, light emitting diode connection；The buzzer by the third divider resistance with it is described
The other end of power supply connects；The light emitting diode and the concatenated branch of the second divider resistance are in parallel with the buzzer
Afterwards, it is connect using the third divider resistance with another pole of the power supply；
The intermediate relay is used to control the disconnection and conducting of the intermediate relay normally closed contact；
The voltage detection unit and the trigger relay of encouraging by force are for voltage triggered normally closed contact described in co- controlling
With the voltage triggered normal opened contact；The voltage detection unit or it is described encourage trigger relay triggering by force after, voltage touching
Send out normally closed contact disconnection, voltage triggered normal opened contact conducting.
Preferably, the current-limiting resistance uses mega-ohms resistance.
Preferably, the ac filter unit uses the nonpolarity electron capacitance of large capacity.
Preferably, the power of alterating and direct current partition method the following steps are included:
The button of the manual control circuit is pinned, to force to disconnect the short circuit circuit；
Examine the integrity in the voltage triggered circuit；
The both ends for being shorted test are connect with short-circuited terminal respectively；
The button for unclamping the manual control circuit, carries out short circuit test.
Preferably, if the integrity for examining the voltage triggered circuit includes: the described of the audible and visual alarm circuit
Lumination of light emitting diode, and the buzzer no alarm, then the function in the voltage triggered circuit is normal.
Preferably, the short circuit, which is tested, includes:
When the both ends for being shorted test are direct current or are exchange, the voltage at the voltage detection unit both ends is low
In given threshold, the short circuit circuit conducting；
When described one end for being shorted test is exchange, one end is direct current, the voltage at the voltage detection unit both ends is high
In given threshold, the voltage triggered normally closed contact is disconnected, and the short circuit circuit disconnects；The voltage triggered normal opened contact is led
It is logical, the lumination of light emitting diode in the audible and visual alarm circuit, and the buzzer issues alarm, disconnects the short circuit in time
The both ends of test and the connection of short-circuited terminal.
Preferably, the voltage at the voltage detection unit both ends are as follows:
U=rms (k | u1-u2|) (1)
Wherein, the both ends for being shorted test are respectively the end V1, the end V2, u1For the voltage at the end V1, u2For the end V2
Voltage, u be the voltage detection unit both ends voltage, k be partial pressure coefficient.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
In the embodiment of the present application, a kind of power of alterating and direct current partition method that test is shorted for substation secondary is proposed,
According to the otherness for being shorted test both end voltage value, when both ends are direct current or are exchange, automatic short circuit is connected；Work as one end
To exchange, its electrical communication of blocking is triggered when one end is direct current, and issues audible and visual alarm, guarantees AC and DC power supply when maloperation
Be effectively isolated.
Detailed description of the invention
It, below will be to needed in embodiment description in order to illustrate more clearly of the technical solution in the present embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is one embodiment of the present of invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of power of alterating and direct current partition method that test is shorted for substation secondary provided in an embodiment of the present invention
Flow chart；
Fig. 2 is a kind of power of alterating and direct current partition method that test is shorted for substation secondary provided in an embodiment of the present invention
The circuit block diagram of use；
Fig. 3 is a kind of power of alterating and direct current partition method that test is shorted for substation secondary provided in an embodiment of the present invention
The voltage oscillogram at middle voltage detection unit both ends.
Wherein, 1- voltage triggered normally closed contact, 2- current-limiting resistance, 3- rectifier diode, 4- voltage detection unit, 5- exchange
Filter unit, 6- encourage by force trigger relay, 7- intermediate relay, 8- button, the first divider resistance of 9-, and 10- voltage triggered is normally opened
Contact, 11- intermediate relay normally closed contact, 12- buzzer, 13- light emitting diode, the second divider resistance of 14-1-, 14-2-
Three divider resistances, 15- power supply, when 16-V1, V2 voltage are respectively positive and negative 55V, the voltage at voltage detection unit both ends, 17-V1
Or V2 is terminated when exchanging into 220V, the voltage at voltage detection unit both ends.
Specific embodiment
The embodiment of the present application is by providing a kind of power of alterating and direct current partition method for being shorted test for substation secondary, solution
It has determined to be shorted to test in the prior art and has been easy to appear maloperation, thus the problem of causing the AC in the DC system.
The technical solution of the embodiment of the present application is in order to solve the above technical problems, general thought is as follows:
A kind of power of alterating and direct current partition method being shorted test for substation secondary, when the both ends for being shorted test are straight
When flowing or being exchange, it is shorted circuit conducting；When described one end for being shorted test is exchange, one end is direct current, the short circuit
Circuit disconnects, and audible and visual alarm circuit issues audible and visual alarm information；
The circuit that is shorted connects the both ends for being shorted test, and the short circuit circuit is in parallel with voltage triggered circuit；Institute
State audible and visual alarm circuit respectively with manual control circuit, power sources in parallel；
The voltage triggered circuit and the manual control circuit are accused for short circuit circuit, the acousto-optic described in co- controlling
Alert circuit is turned on or off.
The present invention proposes a kind of power of alterating and direct current partition method that test is shorted for substation secondary, tests according to being shorted
The otherness of both end voltage value is shorted circuit conducting when the both ends for being shorted test are direct current or are exchange；It is surveyed when being shorted
When one end of examination is exchange, one end is direct current, triggering blocks its electrical communication, and issues audible and visual alarm, guarantee to hand over when maloperation,
DC power supply is effectively isolated.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
The present invention provides a kind of power of alterating and direct current partition method that test is shorted for substation secondary, examines for substation
The mixed connection risk of station AC and DC power supply system during repairing, the voltage characteristic according to substation's AC and DC power supply system are poor
It is different, the on-off for being shorted test link circuit is automatically controlled, is ensured when short circuit test macro both ends AC and DC characteristic is inconsistent short
It takes back road not to be connected to, and issues audible and visual alarm auxiliary repair personnel and judge whether there is maloperation, be shorted process and surveyed without artificial
Amount and differentiation avoid tradition maintenance and are shorted the safety accident caused under test mode by artificial maloperation.
Specifically, when the both ends for being shorted test are direct current or are exchange, the voltage detection unit both ends
Voltage be lower than given threshold, two terminal circuits by closure voltage triggered normally closed contact keep connection, the short circuit circuit is led
It is logical.When described one end for being shorted test is exchange, one end is direct current, the voltage at the voltage detection unit both ends is higher than setting
Threshold value, the voltage triggered normally closed contact disconnect, and the short circuit circuit disconnects；The voltage triggered normal opened contact conducting, it is described
The lumination of light emitting diode in audible and visual alarm circuit, and the buzzer issues alarm, disconnects the short circuit test in time
The connection at both ends and short-circuited terminal.
Fig. 1 is a kind of process of power of alterating and direct current partition method that test is shorted for substation secondary provided by the invention
Figure.The following steps are included: connect manual control circuit, self-check of device, start be shorted, disconnect manual control circuit, according to whether
Alarm is completed to be shorted test or stops being shorted.The present invention carried out under conditions of the manual control circuit is connected self-check of device with
It is shorted, it is ensured that the short circuit circuit reliably disconnects before the voltage detection unit works normally, and is connected firmly to short-circuited terminal
After can disconnect the manual control circuit.The voltage detection unit can reflect both end voltage situation, to voltage triggered contact
It is controlled with audible and visual alarm signal.
The present invention proposes a kind of test dress that the power of alterating and direct current partition method for being shorted test for substation secondary uses
It sets as shown in Figure 2, comprising: be shorted circuit, voltage triggered circuit, manual control circuit, power supply 15, audible and visual alarm circuit；It is described
The both ends that circuit connection is shorted test are shorted, the voltage triggered circuit is in parallel with the short circuit circuit；It is described to manually control back
Road, the power supply 15, the audible and visual alarm circuit are in parallel.
Wherein, the short circuit circuit includes voltage triggered normally closed contact 1.The voltage triggered circuit include current-limiting resistance 2,
Rectifier diode 3, voltage detection unit 4, ac filter unit 5.The manual control circuit include by force encourage trigger relay 6,
Intermediate relay 7, button 8, the first divider resistance 9.The alarm circuit includes voltage triggered normal opened contact 10, intermediate relay
Normally closed contact 11, buzzer 12, light emitting diode 13, the second divider resistance 14-1, third divider resistance 14-2.The power supply 15
For DC power supply.
The voltage triggered circuit and the short circuit circuit, which are connected in parallel to, is shorted test object both ends V1, V2, and four described whole
Stream diode 3 is connected with four current-limiting resistances 2 respectively, forms bridge circuit；The parallel connection of rectifier bridge both ends accesses the voltage
Detection unit 4 and the ac filter unit 5.
The power supply 15, the manual control circuit are in parallel with the alarm circuit.
Described in the manual control circuit encourages trigger relay 6, the intermediate relay 7, the button 8, institute by force
It states the first divider resistance 9 and forms series loop.
One pole of the power supply 15 is connect with the voltage triggered normal opened contact 10 in the alarm circuit, the voltage
Triggering normal opened contact 10 is connect with the light emitting diode 13, the intermediate relay normally closed contact 11, the intermediate relay
Normally closed contact 11 is connect with the buzzer 12, and the buzzer 12 is by the third divider resistance 14-2 and the power supply 15
Another pole connection；The light emitting diode 13 and the concatenated branch of the second divider resistance 14-1 and the buzzer 12 are simultaneously
After connection, it is connect using the third divider resistance 14-2 with another pole of the power supply 15.
The voltage detection unit 4 with it is described encourage by force voltage triggered normally closed contact 1 described in 6 co- controlling of trigger relay and
The voltage triggered normal opened contact 10, the voltage detection unit 4 and it is described by force encourage trigger relay 6 any one triggering after, institute
The disconnection of voltage triggered normally closed contact 1 is stated, the voltage triggered normal opened contact 10 is connected；The intermediate relay 7 controls in described
Between relay normally closed contact 11 disconnection and conducting.
The voltage detection unit 4 is connected using the big valued resistor of voltage triggered relay series connection with current-limiting resistance composition
The voltage difference at the both ends V1, V2 is reflected rectifier bridge in circuit in a manner of dividing；The ac filter unit 5 uses large capacity
Nonpolarity electron capacitance acts on when circuit seals in exchange Shi Qiping wave, the voltage u at 4 both ends of voltage detection unit is kept to begin
Eventually more than given threshold.
The value of voltage u can approximation regard as:
U=rms (k | u1-u2|) (1)
Wherein, u1For the end V1 voltage, u2For the end V2 voltage, u is voltage detection unit both end voltage, and k is partial pressure coefficient.
Fig. 3 is the voltage oscillogram at heretofore described 4 both ends of voltage detection unit.Work as u1=55V, u2When=- 55V, electricity
Press the stable state waveform of u as shown in lines 16；Work as u1Or u2In one end access 220V exchange when, it is specific such as u1=~220V, u2For
When 55V or -55V, the stable state waveform of voltage u is as shown in lines 17.
When the one end for being shorted test is exchange, one end is direct current, the voltage at 4 both ends of voltage detection unit, which is higher than, to be set
Determine threshold value, controls the voltage triggered normally closed contact 1 and disconnect, the short circuit circuit can not be connected to, while in the alarm circuit
The light emitting diode 13 and the buzzer 12 be connected through the voltage triggered normal opened contact 10, issue audible and visual alarm.When
The both ends for being shorted test are when exchanging or being direct current, and the voltage at 4 both ends of voltage detection unit is lower than given threshold, institute
State the voltage triggered normally closed contact 1 holding connection for being shorted circuit by closure.
It is described when the function in the audible and visual alarm circuit includes: that the voltage at 4 both ends of voltage detection unit is higher than threshold value
Light emitting diode 13 and the buzzer 12 are simultaneously emitted by alarm, and there are 220V AC voltages for expression system.It presses described manual
When button Final 8 system in control loop disconnects the short circuit circuit, the light emitting diode 13 is connected, but the buzzer
12 do not alert, and indicate that the system is in test mode, and circuit basic function is normal.
The function of the manual control circuit includes: to examine for system circuit, is connected in the access of the end V1, V2 no-voltage
The manual control circuit, if return circuit is normal, the light emitting diode 13 shines, and 12 no alarm of the buzzer；?
Force to disconnect the short circuit circuit in advance before being shorted test, avoid the end V1, V2 with to short-circuited terminal Contact, because of poor contact
The problems such as cause the voltage detection unit 4 to be judged by accident, disconnect the manual control circuit again after connection to be confirmed is good.Its work
Principle are as follows: described to encourage trigger relay 6 and the intermediate relay 7 by force after the button 8 of the manual control circuit is pressed
Movement；The trigger relay 6 of encouraging by force controls the voltage triggered normally closed contact 1 and the voltage triggered normal opened contact 10, institute
Voltage triggered normally closed contact 1 is stated for disconnecting the short circuit circuit by force manually, the voltage triggered normal opened contact 10 is for leading
Lead to the light emitting diode 13；The intermediate relay that the intermediate relay 7 controls the audible and visual alarm circuit normally closed connects
Point 11, for disconnecting the sound alarm of the buzzer 12 when manually controlling.
Since the current-limiting resistance 2 is all made of the big resistance of mega-ohms, the voltage triggered circuit is believed that short circuit
Circuit does not have an impact.Equally, test result, which shows the system also, does not influence the voltage level of AC and DC system itself.
A kind of power of alterating and direct current partition method for substation secondary short circuit test provided in an embodiment of the present invention is at least
Including following technical effect:
In the embodiment of the present application, a kind of power of alterating and direct current isolation side that test is shorted for substation secondary is proposed
Method reflects the feature of connect both end voltage by voltage detection unit without artificial measurement and judgement, to the on-off for being shorted circuit
It carries out automatically controlling, and issues acousto-optic alarm signal assist operators and differentiate, to avoid caused by artificial incorrect operation
Alternating current-direct current mixed connection accident is suitable for substation station 220V AC system and direct current system, and circuit theory is simply direct, has
Higher reliability.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (7)
1. a kind of power of alterating and direct current partition method for being shorted test for substation secondary, which is characterized in that when short circuit test
When both ends are direct current or are exchange, it is shorted circuit conducting；When described one end for being shorted test is exchange, one end is direct current
When, the short circuit circuit disconnects, and audible and visual alarm circuit issues audible and visual alarm information；
The circuit that is shorted connects the both ends for being shorted test, and the short circuit circuit is in parallel with voltage triggered circuit；The sound
Light alert circuit respectively with manual control circuit, power sources in parallel；
The voltage triggered circuit and the manual control circuit are returned for short circuit circuit, the audible and visual alarm described in co- controlling
Road is turned on or off；
The voltage triggered circuit includes rectifier diode, current-limiting resistance, voltage detection unit, ac filter unit；Four institutes
It states rectifier diode to connect with four current-limiting resistances respectively, and forms bridge circuit；The voltage detection unit and described
The both ends of ac filter unit parallel connection access rectifier bridge；
The short circuit circuit includes voltage triggered normally closed contact；
The manual control circuit includes button, intermediate relay, encourages trigger relay, the first divider resistance by force, and is successively gone here and there
Connection connection；The button is connect with one end of the power supply, and first divider resistance is connect with the other end of the power supply；
The power supply is DC power supply；
The audible and visual alarm circuit includes voltage triggered normal opened contact, light emitting diode, intermediate relay normally closed contact, buzzing
Device, the second divider resistance, third divider resistance；The voltage triggered normal opened contact is connect with one end of the power supply；In described
Between one end of relay normally closed contact connect with the buzzer, the other end of the intermediate relay normally closed contact respectively with institute
State voltage triggered normal opened contact, light emitting diode connection；The buzzer is by the third divider resistance and the electricity
The other end in source connects；After the light emitting diode is in parallel with the buzzer with the concatenated branch of the second divider resistance,
It is connect using the third divider resistance with another pole of the power supply；
The intermediate relay is used to control the disconnection and conducting of the intermediate relay normally closed contact；
The voltage detection unit and the trigger relay of encouraging by force are for voltage triggered normally closed contact and institute described in co- controlling
State voltage triggered normal opened contact；The voltage detection unit or it is described by force encourage trigger relay triggering after, the voltage triggered is normal
Close contact disconnection, voltage triggered normal opened contact conducting.
2. the power of alterating and direct current partition method according to claim 1 for being shorted test for substation secondary, feature exist
In the current-limiting resistance uses mega-ohms resistance.
3. the power of alterating and direct current partition method according to claim 1 for being shorted test for substation secondary, feature exist
In the ac filter unit uses the nonpolarity electron capacitance of large capacity.
4. the power of alterating and direct current partition method according to claim 1 for being shorted test for substation secondary, feature exist
In, the power of alterating and direct current partition method the following steps are included:
The button of the manual control circuit is pinned, to force to disconnect the short circuit circuit；
Examine the integrity in the voltage triggered circuit；
The both ends for being shorted test are connect with short-circuited terminal respectively；
The button for unclamping the manual control circuit, carries out short circuit test.
5. the power of alterating and direct current partition method according to claim 4 for being shorted test for substation secondary, feature exist
In if the integrity for examining the voltage triggered circuit includes: the light emitting diode hair in the audible and visual alarm circuit
Light, and the buzzer no alarm, then the function in the voltage triggered circuit is normal.
6. the power of alterating and direct current partition method according to claim 4 for being shorted test for substation secondary, feature exist
In the short circuit test includes:
When the both ends for being shorted test are direct current or are exchange, the voltage at the voltage detection unit both ends, which is lower than, to be set
Determine threshold value, the short circuit circuit conducting；
When described one end for being shorted test is exchange, one end is direct current, the voltage at the voltage detection unit both ends, which is higher than, to be set
Determine threshold value, the voltage triggered normally closed contact disconnects, and the short circuit circuit disconnects；The voltage triggered normal opened contact conducting, institute
The lumination of light emitting diode in audible and visual alarm circuit is stated, and the buzzer issues alarm, disconnects the short circuit test in time
Both ends and short-circuited terminal connection.
7. the power of alterating and direct current partition method according to claim 6 for being shorted test for substation secondary, feature exist
In the voltage at the voltage detection unit both ends are as follows:
U=rms (k | u1-u2|) (1)
Wherein, the both ends for being shorted test are respectively the end V1, the end V2, u1For the voltage at the end V1, u2For the electricity at the end V2
Pressure, u are the voltage at the voltage detection unit both ends, and k is partial pressure coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117917.XA CN107681648B (en) | 2017-11-13 | 2017-11-13 | A kind of power of alterating and direct current partition method being shorted test for substation secondary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117917.XA CN107681648B (en) | 2017-11-13 | 2017-11-13 | A kind of power of alterating and direct current partition method being shorted test for substation secondary |
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| Publication Number | Publication Date |
|---|---|
| CN107681648A CN107681648A (en) | 2018-02-09 |
| CN107681648B true CN107681648B (en) | 2019-06-14 |
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| CN114301031B (en) * | 2022-03-03 | 2022-05-27 | 广东电网有限责任公司珠海供电局 | Emergency stop device of live working robot of transformer substation |
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| CN1780081A (en) * | 2004-11-26 | 2006-05-31 | 鸿富锦精密工业（深圳）有限公司 | Protecting circuit of AC power supply for preventing misconnection |
| CN203135401U (en) * | 2013-03-30 | 2013-08-14 | 国家电网公司 | AC invasion protection device for DC system of transformer substation |
| CN104330607A (en) * | 2014-07-15 | 2015-02-04 | 国家电网公司 | AC-into-DC-system detection and forced tripping device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8976550B2 (en) * | 2011-08-18 | 2015-03-10 | Cyber Power Systems Inc. | Power supply having a surge protection circuit |
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2017
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| CN1780081A (en) * | 2004-11-26 | 2006-05-31 | 鸿富锦精密工业（深圳）有限公司 | Protecting circuit of AC power supply for preventing misconnection |
| CN203135401U (en) * | 2013-03-30 | 2013-08-14 | 国家电网公司 | AC invasion protection device for DC system of transformer substation |
| CN104330607A (en) * | 2014-07-15 | 2015-02-04 | 国家电网公司 | AC-into-DC-system detection and forced tripping device |
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| 变电站交流串入直流系统的危害及其防范措施;王军;《中国高新技术企业》;20141029(第32期);第1-3节 |
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| CN107681648A (en) | 2018-02-09 |
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